Solutions by everydaycalculation.com
1st number: 2/21, 2nd number: 5 5/7
221 - 407 is -11821.
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Related: 4/21-40/7 2/21-80/7 2/42-40/7 2/21-40/14 6/21-40/7 2/63-40/7 2/21-40/21 10/21-40/7 2/21-40/35 14/21-40/7 2/21-40/49
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